Description

The Upper Lip Bite Test (ULBT) can be used to screen a patient for the risk of a difficult endotracheal intubation.


 

Patient selection: laryngoscopy with endotracheal intubation

 

Examination: relationship of the lower incisors to the upper limt

 

Examination

Class

Intubation

lower incisors can bite the upper lip above the vermilion line

I

not difficult

lower incisors can bite the upper lip below the vermilion line

II

intermediate

lower incisors cannot reach the upper lip

III

difficult

 


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